I'm on a Mac OS X 10.7.3, using testdisk 6.14-WIP-Intel and I'm unable to recover a Bootcamp partition which I can't boot, I can't see it in Finder but testdisk has it listed and all the files appears to be there.
I'm receiving the message "Partition: write error".

In the beggining it's shown "Write access for this media is not available.
TestDisk won't be able to modify it."

I've tried tried disabling iAntiVirus with no different result.
I've got a few screenshots, testdisk log and rEfit PartitionInspector results:

Great news!
I've downloaded Ubuntu, put it in a USB drive and used it to restart in it.
In it's terminal I've used parted to write the start and end of the partition I wanted to restore (the numbers I previously got from using TestDisk) and it could write normally! Everything is fine now!